Millie, 27, couldn't keep her hands off her former co-star as they celebrated Halloween together, showing off their costumes on Instagram.

Nearly locking lips with Hugo in the cosy snap, Millie is seen wearing a floral headpiece while her beau opted to dress as a skeleton, adding a mask to his look while gazing romantically at his girlfriend.

"You will be the death of me," the fashion designer wrote on her photo, accompanied by a heart emoji.

Millie seems to be ignoring her former husband's latest single, One Eye On The Door, in which he appears to open up on their marriage.

Seemingly taking a jab at their lack of sex life, the 32 year old raps: “Me and the Mrs we are getting along, till I do something wrong – then it’s another domestic, People wanna know what my life’s like.

Talking to the camera as if he had just returned home to his other half after a night-out, Pro Green said: “Babe look I’m sorry, I’m sorry, when I said I’d be home at six, I didn’t specify AM or PM, or today or tomorrow.